Specific trx and results directory for test result reporting

Author: elinor-fung

src/installer/tests/helixpublish.proj

@@ -47,7 +47,7 @@
     </MSBuild>
     <ItemGroup>
       <HostTestProject>
-        <Command>dotnet test $([System.IO.Path]::GetFileName($(_TargetPath))) $(TestRunnerAdditionalArguments)</Command>
+        <Command>dotnet test $([System.IO.Path]::GetFileName($(_TargetPath))) $(TestRunnerAdditionalArguments) --logger trx --results-directory .</Command>
         <PayloadDirectory>$(_PayloadDirectory)</PayloadDirectory>
       </HostTestProject>
     </ItemGroup>